Rotary-hook sewing-machine.



M. HEMLEB.

ROTARY HOOK SEWING MACHINE.

APPLICATION FILED AuG.2|. 19x4.

1,226,973. Patented Ma 22, 1917.

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M. HEMLEB.

ROTARY HOOK SEWING MACHINE.

- APPLICATION FILED AUG-21,1914.

Patented May 22, 1917.

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UNITED STATES PATENT OFFICE.

MARTIN HEMLEB, OF ELIZABETH, NEW JERSEY," ASSIGNOR TO THE SINGER MANU- FACTURING COMPANY; A CORPORATION OFNEW JERSEY;

ROTARY-HOOK SEWING-MACHINE.

Application filed August 21, 1914 SrialNo. 857,811

To all whom 2'2? may concern:

Be'it known that I, MARTIN. HnMLEB, a

citizen of the United States, residing at Elizabeth, in the county of Union and State SewingMachines, of which-the following is a specification, reference being had therein to the accompanying drawings.

This invention has for its primary object toprovidesimple and effective means for.

replacement of the bobbins in circularly moving loop-takers having journaled therein thread-cases restrained from circular movement therewith, and applicable to looptakers comprising rotary loop-seizing members having continuous or recip'rocatory movements upon axes passing through their body portions. p

According to the present improvement, the cup-shaped body of the loop-taker has journaled therein a thread-case provided with a central thread-cavity and hasformed in its rim a radial slot crossed by afulcrumpin upon which'is mounted an angular bobbin-ejecting lever having a radial arm extending beneath and adaptedto enter the thread-cavity of the thread-case and a sec- 0nd upwardly extending arm disposed exterior to the loop-taker rim and provided with a finger-piece presented for convenient pressure by the operator for ejecting abobbin from the thread-case.

The main-shaft journaled in the overhanging member of the bracket-arm is con- In the drawings, Figure 1 is a side elevation of a sewing machine embodying the present improvements with the frame partly in section, and Fig.2is a bottom plan view of the same, Fig. .3 is a plan, upon an enlarged scale, of a portion of the bed-plate, the throat-plate, and the loop-taker, and Fig. & a sectional elevation of the same. Fig. 5

is a" perspective view of the bobbin-ejector detached.

The frame of the machine comprises the us al b d-P t 1 .from h ch rises the h low bracket'arm standard 2 having the tu-' bula-r'lateral member .3 within which is I Specification of LettersP'at'ent'. V Pate ted May 2 2, 1917.

'journaled the main or driving shaft 4 hav- 2 ing the usual operative connection with the reciprocating needle-bar 5 carrying the nee- Depending from the bed-plate 1 is the bearing bracket 7 in which is 'journaledthe vertical loop-taker shaft 8 having secured thereon by means of the set-screw 9 the hub 10 of the cup shaped loop-seizing member 11 provided with the beak12. The member 11 has journaled therein .in a manner well known, by means of a tongue-and-groove connection, the thread-case 13 formed with.

the thread-cavity ltcontaining the lowerthrea'd bobbin 15v and provided with the lateral finger 16 embraced by the spaced hold ing lugs 17 depending from the throat-plate 18 for restraining the thread-case from rotation. The thread-case has in its bottom a central opening 19 for access to the bobbin.

and tapped into said rim. The bobbinejecting angle-lever comprises a lateral arm 22 disposed within the slot 20 beneath the thread-case and an upwardly extending arm 23 terminating in the finger-piece or plate 24 disposed externally tothe member 11 apertured ears 22 beingturned up from the base of the arm 22 and entered by the fulcrumpin 21. Between the ears 22, the fulcrumpin is surrounded by a coil-spring 25 having one extremity 26 engaging the bobbin-ejector arm 23 and the other extremity 27 in engagement with the member 11, by means of which the ejecting lever isv yieldingly maintained in retracted position with the arm 22 in the lower position, as represented in Fig. 4.

The loop-seizing member 11 being turned to expose the finger-piece 24 at one side of the throat-plate, pressure upon such finger by the operator serves to lift the bobbin sufficiently above the wall of the thread-case to enable its upper flange to be grasped by the operator for removal.

The lower end of the loop-taker shaft 8 has secured thereon by means of the setscrew 28 the hub 29 of a crank member shaft 8, and a similar crank element 32 is fixed upon the loWer end of the vertical in- 'termediate shaft 33 which is journaled within the bearing bosses 34 and embraced by the standard 2. The crank-studs of the shafts 8 and 33 are connected by means of the pitmen 35 to establish driving relation between said shafts. The shaft 33 has fixed upon its upper end the bevel pinion 36 meshing with the bevel ear 37 of double its size fixed upon the main-shaft 4 by which the intermediate shaft is driven at twice the speed of the mainshaft, its movements being imparted to the loop-taker shaft through the described erank-and-pitman connection.

Having thus set forth the nature of the invention, what I claim herein is l. A sewing machine loop-taker eom' prising a rotary loop-seizing member, a thread-case formed with a thread-cavity and journaled in said member in which it is restrained from rotary movement, and a bobbin-ejector sustained by said loop-seizing member independently of the thread-case and adapted to enter said thread-cavity.

2. A sewing machine loop-taker comprising a cup-shaped loop-seizing member, a thread-case formed with a thread-cavity and journaled in said member in which it is restrained from rotary movement, and a bobbin-ejector comprising an angle-lever journaled in the rim of the loop-seizing member and having a radially extending arm adapted to enter said thread-cavity.

3. A sewing machine loop-taker comprising a cup-shaped loop-seizing member formed at one side with a radial slot passing through its wall, a thread-case formed with a thread-cavity and journaled in said member in which it is restrained from rotary movement, a fulcrum-pin extending across said slot of the loop-seizing member, a bobbin-ejector comprising an angle-lever formed at the edges with spaced parallel ears entered by said fulcrun'i-pin and having one arm extended radially and adapted to enter the thread-cavity and another arm disposed mainly exterior to the loop-seizing member and provided with a finger-piece, and a spring surrounding said fulcrum-pin intermediate said ears of the bobbin-ejecting angle-lever and connected at opposite ends respectively with the latter and the loopseizing member.

4. A sewing machine loop-taker mecha nism comprising a driving shaft, a rotary loop-seizing member mounted. on said shaft, a thread-case formed with a thread-cavity and journaled in said member in which it is rest 'ained from rotary movement, and a bobbin ejector sustained by said loop-sei7'ing member independently of the thread-case and adapted to enter said thread-cavity.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

MARTIN HEMLEB.

Witnesses:

FREDERICK TURNOCK, M. P. STEWART.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington; D. 0. 

